#!/bin/bash

# Copyright 2014-22 Klaatu, Wellington NZ
# GNU All-Permissive License
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.  This file is offered as-is,
# without any warranty.

# 20220322 bkw: Modified by SlackBuilds.org: fix 32-bit build.

cd $(dirname $0) ; CWD=$(pwd)

PRGNAM=mitsuba2
VERSION=${VERSION:-4e7628c}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.xz
cd $PRGNAM-$VERSION
chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \+ -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \+

case "$ARCH" in
  i?86) patch -p1 < $CWD/32bit.diff ;;
esac

mkdir -p build
cd build
cmake -GNinja \
  $extra \
  -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
  -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
  -DCMAKE_INSTALL_PREFIX=/usr \
  -DLIB_SUFFIX=${LIBDIRSUFFIX} \
  -DMAN_INSTALL_DIR=/usr/man \
  -DCMAKE_BUILD_TYPE=Release ..
ninja

# no install option provided, so copy compiled code to /opt
mkdir -p $PKG/opt
mv dist $PKG/opt/$PRGNAM-$VERSION
find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

mkdir -p $PKG/usr/bin
ln -s $PKG/opt/$PRGNAM-$VERSION/mitsuba $PKG/usr/bin/mitsuba

cd ..

# sample scenes
mkdir -p $PKG/usr/share/$PRGNAM-$VERSION
cp -a resources $PKG/usr/share/$PRGNAM-$VERSION

# docs
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a setpath.sh $PKG/usr/doc/$PRGNAM-$VERSION
cp LICENSE README.md $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

# generated docs
if [ "$DOCS" ]; then
    mkdir $PKG/usr/doc/$PRGNAM-$VERSION/html
    sphinx docs $PKG/usr/doc/$PRGNAM-$VERSION/html
fi

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE
